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Instructions
What will come in place of the question mark (?) in the given number series?
Solution
Numbers of the form $$2^n$$ are multiplied, where $$n \geq -1$$
18 $$\times 2^{-1}$$ = 9
9Â $$\times 2^{0}$$ =Â 9
9Â $$\times 2^{1}$$ =Â 18
18Â $$\times 2^{2}$$ =Â 72
72Â $$\times 2^{3}$$ =Â 576
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